/* Copyright (c) 2016, David Boehme.
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * 1. Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 * 
 * 2. Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/*! \file  unitfmt.c
 *  \brief Scale values to human-readable size
 */

#include "unitfmt.h"

const struct unitfmt_table unitfmt_bytes[] = { { 1, "Byte(s)" },
                                               { 1024, "KiB" },
                                               { 1024 * 1024, "MiB" },
                                               { 1024 * 1024 * 1024, "GiB" },
                                               { 0, "GiB" } };

unitfmt_result unitfmt(unsigned long long val, const struct unitfmt_table table[])
{
    double         dval   = (double) val;
    unitfmt_result result = { dval, table[0].symbol };

    for (const struct unitfmt_table* p = table; p->factor && dval >= p->factor; ++p) {
        result.val    = dval / p->factor;
        result.symbol = p->symbol;
    }

    return result;
}
